Magnetic resonance imaging (MRI) compatible ultrasound therapeutic system

Takashi Azuma, Kazuaki Sasaki, Ken Ichi Kawabata, Akiko Osada, Hiroyuki Itagaki, Kazumi Komura, Tetsuhiko Takahashi, Kazunari Ishida, Yutaka Satoh, Shin Ichiro Umemura

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Since an ultrasound (US) imaging system can image in real-time and interactively, it can be used as an image guidance assisting magnetic resonance imaging (MRI) for minimally invasive therapy. The effects of MRI-compatible US probes on MRI monitoring were evaluated, and it was found that the MRI-compatible US probes, whose backing material contained 100 ppm ferrite, did not disturb MR monitoring except at a few mm radius from the US probe's position. MRI temperature monitoring of a swine liver irradiated with a high-intensity focused US beam from an MRI-compatible therapeutic transducer with US image guidance was then performed, and the potential usefulness of such a therapeutic system in minimally invasive therapy was demonstrated.

Original languageEnglish
Pages (from-to)3579-3584
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number5 B
Publication statusPublished - 2002 May
Externally publishedYes


  • HIFU
  • MRI compatible
  • Minimally invasive therapy
  • Temperature mapping

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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